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Sökning: onr:"swepub:oai:research.chalmers.se:95975006-ea49-4528-a47e-7086622f1551" > Big Three Dragons: ...

Big Three Dragons: A z=7.15 Lyman-break galaxy detected in [Oiii] 88 mu m, [Cii] 158 mu m, and dust continuum with ALMA

Hashimoto, Takuya (författare)
Waseda University,National Astronomical Observatory of Japan,Osaka Sangyo University,Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan;Osaka Sangyo Univ, Fac Design Technol, Dept Environm Sci & Technol, 3-1-1 Nagaito, Daito, Osaka 5748530, Japan;Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
Inoue, Akio K. (författare)
Osaka Sangyo University,Osaka Sangyo Univ, Fac Design Technol, Dept Environm Sci & Technol, 3-1-1 Nagaito, Daito, Osaka 5748530, Japan,Univ Tokyo, Grad Sch Sci, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan;Univ Tokyo, Grad Sch Sci, Res Ctr Early Universe, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
Mawatari, Ken (författare)
University of Tokyo, Japan,Osaka Sangyo University,Osaka Sangyo Univ, Fac Design Technol, Dept Environm Sci & Technol, 3-1-1 Nagaito, Daito, Osaka 5748530, Japan;Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan
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Tamura, Yoichi (författare)
Nagoya University,Nagoya Univ, Grad Sch Sci, Div Particle & Astrophys Sci, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan
Matsuo, Hiroshi (författare)
The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan,Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan;Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
Furusawa, Hisanori (författare)
National Astronomical Observatory of Japan,Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
Harikane, Yuichi (författare)
University of Tokyo, Japan,Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan;Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
Shibuya, Takatoshi (författare)
Kitami Institute of Technology,Kitami Inst Technol, Dept Comp Sci, 165 Koen Cho, Kitami, Hokkaido 0908507, Japan
Knudsen, Kirsten Kraiberg, 1976 (författare)
Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Onsala Space Observ, Dept Space Earth & Environm, SE-43992 Onsala, Sweden
Kohno, Kotaro (författare)
University of Tokyo, Japan
Ono, Yoshiaki (författare)
University of Tokyo, Japan,Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan
Zackrisson, Erik (författare)
Uppsala universitet,Observationell astrofysik
Okamoto, Takashi (författare)
Hokakido Univ, Grad Sch Sci, Dept Cosmosci, Kita Ku, N10 W8, Sapporo, Hokkaido 0600810, Japan
Kashikawa, Nobunari (författare)
University of Tokyo, Japan,National Astronomical Observatory of Japan,The Graduate University for Advanced Studies (SOKENDAI),Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan;Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan;Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
Oesch, Pascal A. (författare)
Université de Genève,University of Geneva,Univ Geneva, Geneva Observ, Ch Maillettes 51, CH-1290 Versoix, Switzerland
Ouchi, Masami (författare)
University of Tokyo, Japan,Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan;Univ Tokyo, Todai Inst Adv Study, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan
Ota, Kazuaki (författare)
Kyoto University,Kyoto Univ, Res Adm Off, Sakyo Ku, Kyoto, Kyoto 6068501, Japan
Shimizu, Ikkoh (författare)
Osaka University,Osaka Univ, Dept Earth & Space Sci, Theoret Astrophys, 1-1 Machikaneyama, Toyonaka, Osaka 5600043, Japan
Taniguchi, Yoshiaki (författare)
The Open University of Japan,Open Univ Japan, Mihama Ku, 2-11 Wakaba, Chiba, Chiba 2618586, Japan
Umehata, Hideki (författare)
The Open University of Japan,RIKEN,Open Univ Japan, Mihama Ku, 2-11 Wakaba, Chiba, Chiba 2618586, Japan;RIKEN Cluster Pioneering Res, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
Watson, Darach (författare)
Köpenhamns universitet,University of Copenhagen,Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Lyngbyvej 2,4 Sal, DK-2100 Copenhagen, Denmark
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 (creator_code:org_t)
2019-06-17
2019
Engelska.
Ingår i: Publication of the Astronomical Society of Japan. - : Oxford University Press (OUP). - 2053-051X .- 0004-6264. ; 71:4
Relaterad länk:
https://academic.oup...
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https://research.cha...
https://research.cha...
https://doi.org/10.1...
https://urn.kb.se/re...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • We present new ALMA observations and physical properties of a Lyman break galaxy at z = 7.15. Our target, B14-65666, has a bright ultra-violet (UV) absolute magnitude, M-UV approximate to -22.4, and has been spectroscopically identified in Ly alpha with a small rest-frame equivalent width of approximate to 4 angstrom. A previous Hubble Space TElescope (HST) image has shown that the target is composed of two spatially separated clumps in the rest-frame UV. With ALMA, we have newly detected spatially resolved [Oiii] 88 mu m, [Cii] 158 mu m, and their underlying dust continuum emission. In the whole system of B14-65666, the [Oiii] and [Cii] lines have consistent redshifts of 7.1520 +/- 0.0003, and the [Oiii] luminosity, (34.4 +/- 4.1)x 10(8)L(circle dot), is about three times higher than the [Cii] luminosity, (11.0 +/- 1.4) x 10(8)L(circle dot). With our two continuum flux densities, the dust temperature is constrained to be T-d approximate to 50-60K under the assumption of a dust emissivity index of beta(d) = 2.0-1.5, leading to a large total infrared luminosity of L-TIR approximate to 1 x 10(12)L(circle dot). Owing to our high spatial resolution data, we show that the [Oiii] and [Cii] emission can be spatially decomposed into two clumps associated with the two rest-frame UV clumps whose spectra are kinematically separated by approximate to 200kms(-1). We also find these two clumps have comparable UV, infrared, [Oiii], and [Cii] luminosities. Based on these results, we argue that B14-65666 is a starburst galaxy induced by a major merger. The merger interpretation is also supported by the large specific star formation rate (defined as the star formation rate per unit stellar mass), sSFR Gyr(-1), inferred from our SED fitting. Probably, a strong UV radiation field caused by intense star formation contributes to its high dust temperature and the [Oiii]-to-[Cii] luminosity ratio.

Ämnesord

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

galaxies: high-redshift
galaxies: formation
galaxies: ISM

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art (ämneskategori)
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